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GeForce GTX 780 Ti vs Nvidia Titan X


Intro

The GeForce GTX 780 Ti has a clock speed of 875 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 384-bit memory bus, and makes use of a 28 nm design. It is comprised of 2880 SPUs, 240 Texture Address Units, and 48 Raster Operation Units.

Compare all of that to the Nvidia Titan X, which comes with GPU core speed of 1417 MHz, and 12288 MB of GDDR5X memory set to run at 1251 MHz through a 384-bit bus. It also features 3584 Stream Processors, 224 TAUs, and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

In theory, the Nvidia Titan X is 46% faster than the GeForce GTX 780 Ti overall, due to its greater bandwidth. (explain)

Nvidia Titan X 491520 MB/sec
GeForce GTX 780 Ti 336000 MB/sec
Difference: 155520 (46%)

Texel Rate

The Nvidia Titan X is a lot (approximately 51%) faster with regards to AF than the GeForce GTX 780 Ti. (explain)

Nvidia Titan X 317408 Mtexels/sec
GeForce GTX 780 Ti 210000 Mtexels/sec
Difference: 107408 (51%)

Pixel Rate

The Nvidia Titan X is much (more or less 224%) faster with regards to AA than the GeForce GTX 780 Ti, and able to handle higher screen resolutions more effectively. (explain)

Nvidia Titan X 136032 Mpixels/sec
GeForce GTX 780 Ti 42000 Mpixels/sec
Difference: 94032 (224%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

GeForce GTX 780 Ti

Nvidia Titan X

Specifications

Display Specifications

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Model GeForce GTX 780 Ti Nvidia Titan X
Manufacturer nVidia nVidia
Year November 2013 August 2016
Code Name GK110 GP102-400
Memory 3072 MB 12288 MB
Core Speed 875 MHz 1417 MHz
Memory Speed 7000 MHz 10008 MHz
Power (Max TDP) 250 watts 250 watts
Bandwidth 336000 MB/sec 491520 MB/sec
Texel Rate 210000 Mtexels/sec 317408 Mtexels/sec
Pixel Rate 42000 Mpixels/sec 136032 Mpixels/sec
Unified Shaders 2880 3584
Texture Mapping Units 240 224
Render Output Units 48 96
Bus Type GDDR5 GDDR5X
Bus Width 384-bit 384-bit
Fab Process 28 nm 16 nm
Transistors 7080 million 12000 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 12.0
OpenGL Version OpenGL 4.4 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

GeForce GTX 780 Ti

Nvidia Titan X

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